[libclc] libclc: Use elementwise exp for exp functions (PR #185626)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Matt Arsenault (arsenm)

<details>
<summary>Changes</summary>

For amdgpu use the exp intrinisc. Really, this should be
the default generic implementation. But we're stuck in a
mess where essentially nothing works. All of the exp
intrinsics work for AMDGPU, but aren't really implemented
for spirv or nvptx. Ideally the intrinsic and/or libm call
would be the default implementation.

---
Full diff: https://github.com/llvm/llvm-project/pull/185626.diff


4 Files Affected:

- (modified) libclc/clc/lib/amdgpu/CMakeLists.txt (+3) 
- (added) libclc/clc/lib/amdgpu/math/clc_exp.cl (+15) 
- (added) libclc/clc/lib/amdgpu/math/clc_exp10.cl (+15) 
- (added) libclc/clc/lib/amdgpu/math/clc_exp2.cl (+15) 


``````````diff
diff --git a/libclc/clc/lib/amdgpu/CMakeLists.txt b/libclc/clc/lib/amdgpu/CMakeLists.txt
index cfed021d8fc26..f593bc6fdd8cf 100644
--- a/libclc/clc/lib/amdgpu/CMakeLists.txt
+++ b/libclc/clc/lib/amdgpu/CMakeLists.txt
@@ -1,6 +1,9 @@
 libclc_configure_source_list(CLC_AMDGPU_SOURCES
   ${CMAKE_CURRENT_SOURCE_DIR}
   address_space/qualifier.cl
+  math/clc_exp.cl
+  math/clc_exp2.cl
+  math/clc_exp10.cl
   math/clc_half_exp.cl
   math/clc_half_exp2.cl
   math/clc_half_exp10.cl
diff --git a/libclc/clc/lib/amdgpu/math/clc_exp.cl b/libclc/clc/lib/amdgpu/math/clc_exp.cl
new file mode 100644
index 0000000000000..33c47bf5037e0
--- /dev/null
+++ b/libclc/clc/lib/amdgpu/math/clc_exp.cl
@@ -0,0 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <clc/internal/clc.h>
+
+#define __CLC_FUNCTION __clc_exp
+#define __CLC_IMPL_FUNCTION(x) __builtin_elementwise_exp
+#define __CLC_BODY <clc/shared/unary_def.inc>
+
+#include <clc/math/gentype.inc>
diff --git a/libclc/clc/lib/amdgpu/math/clc_exp10.cl b/libclc/clc/lib/amdgpu/math/clc_exp10.cl
new file mode 100644
index 0000000000000..fcc739fbb7fbd
--- /dev/null
+++ b/libclc/clc/lib/amdgpu/math/clc_exp10.cl
@@ -0,0 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <clc/internal/clc.h>
+
+#define __CLC_FUNCTION __clc_exp10
+#define __CLC_IMPL_FUNCTION(x) __builtin_elementwise_exp10
+#define __CLC_BODY <clc/shared/unary_def.inc>
+
+#include <clc/math/gentype.inc>
diff --git a/libclc/clc/lib/amdgpu/math/clc_exp2.cl b/libclc/clc/lib/amdgpu/math/clc_exp2.cl
new file mode 100644
index 0000000000000..ec65b93b6b52e
--- /dev/null
+++ b/libclc/clc/lib/amdgpu/math/clc_exp2.cl
@@ -0,0 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <clc/internal/clc.h>
+
+#define __CLC_FUNCTION __clc_exp2
+#define __CLC_IMPL_FUNCTION(x) __builtin_elementwise_exp2
+#define __CLC_BODY <clc/shared/unary_def.inc>
+
+#include <clc/math/gentype.inc>

``````````

</details>


https://github.com/llvm/llvm-project/pull/185626